Yes that is well known.
The "top guy" on that list is x
JDCLAMZkcp7fQ3ieHfZA4SLu3aTy2Y1mr
Did it not occur to you that is the same as the Just-Dice bankroll?
Yes but coinmarketcap does not count premined coins that aren't yet circulated. Same with ripple, etc.
It does correctly list "Total Supply" for CLAMS
here but that number isn't used for market cap calculations, "Available Supply" is.